Does a High Carb Diet Make You Fat, Hungry, and Lazy? The answer may surprise you, but the science says no The truth is that people can be healthy and lean eating a huge variety of diets. This should tell you that the answer to better health and fat loss isn't found in cutting one specific macronutrient from your diet, like many low-carb gurus would have you believe. So then why has the Paleo diet gotten so much attention lately? Surely some of the claims about carbs, sugar, and insulin must be true, right?